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    Genetic influences on dental enamel that impact caries differ between the primary and permanent dentitions
    (Wiley, 2015) Bayram, Merve; Deeley, Kathleen; Reis, Maria; Trombetta, Vanessa; Ruff, Timothy; Sencak, Regina; Hummel, Michael; Dizak, Piper; Washam, Kelly; Romanos, Helena; Lips, Andrea; Alves, Gutemberg; Costa, Marcelo; Granjeiro, Jose; Antunes, Leonardo; Kuechler, Erika; Seymen, Figen; Vieira, Alexandre
    Clinically, primary and permanent teeth are distinct anatomically and the presentation of caries lesions differs between the two dentitions. Hence, the possibility exists that genetic contributions to tooth formation of the two dentitions are different. The purpose of this study was to test the hypothesis that genetic associations with an artificial caries model will not be the same between primary and permanent dentitions. Enamel samples from primary and permanent teeth were tested for microhardness at baseline, after carious lesion creation, and after fluoride application to verify association with genetic variants of selected genes. Associations were found between genetic variants of ameloblastin, amelogenin, enamelin, tuftelin, tuftelin interactive protein 11, and matrix metallopeptidase 20 and enamel from permanent teeth but not with enamel from primary teeth. In conclusion, our data continue to support that genetic variation may impact enamel development and consequently individual caries susceptibility. These effects may be distinct between primary and permanent dentitions.
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    Role of estrogen related receptor beta (ESRRB) in DFN35B hearing impairment and dental decay
    (BMC, 2014) Weber, Megan L.; Hsin, Hong-Yuan; Kalay, Ersan; Brozkova, Dana Safka; Shimizu, Takehiko; Bayram, Merve; Deeley, Kathleen; Kuchler, Erika Calvano; Forella, Jessalyn; Ruff, Timothy; Trombetta, Vanessa M.; Sencak, Regina C.; Hummel, Michael; Briseno-Ruiz, Jessica; Revu, Shankar; Granjeiro, Jose Mauro; Antunes, Leonardo Dos Santos; Alves Antunes, Livia Azeredo; Abreu, Fernanda; Costa, Marcelo Castro; Tannure, Patricia Nivoloni; Koruyucu, Mine; Patır, Aslı; Poletta, Fernando; Mereb, Juan C.; Castilla, Eduardo Enrique; Orioli, Leda M.; Marazita, Mary L.; Ouyang, Hongjiao; Jayaraman, Thottala; Seymen, Figen; Vieira, Alexandre Rezende
    Background: Congenital forms of hearing impairment can be caused by mutations in the estrogen related receptor beta (ESRRB) gene. Our initial linkage studies suggested the ESRRB locus is linked to high caries experience in humans. Methods: We tested for association between the ESRRB locus and dental caries in 1,731 subjects, if ESRRB was expressed in whole saliva, if ESRRB was associated with the microhardness of the dental enamel, and if ESRRB was expressed during enamel development of mice. Results: Two families with recessive ESRRB mutations and DFNB35 hearing impairment showed more extensive dental destruction by caries. Expression levels of ESRRB in whole saliva samples showed differences depending on sex and dental caries experience. Conclusions: The common etiology of dental caries and hearing impairment provides a venue to assist in the identification of individuals at risk to either condition and provides options for the development of new caries prevention strategies, if the associated ESRRB genetic variants are correlated with efficacy.